*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: sans-serif;
  scroll-behavior: smooth;
}
section {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 8em;
  font-weight: 800;
  color: rgba(0,0,0,0.25);
  text-transform: uppercase;
  background: var(--clr);
}
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: #333;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 50px 0;
}
.logo {
  position: relative;
  color: #fff;
  font-size: 2em;
  font-weight: 700;
  text-decoration: none;
}
header nav{
  display: flex;
  gap: 10px;
}
header nav a{
  position: relative;
  text-decoration: none;
  padding: 12px 20px;
  color: #fff;
  font-weight: 500;
}
header nav a.active{
  background: var(--clr);
  color: #333;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
}
header nav a.active::before{
  content:'';
  position: absolute;
  left: -20px;
  bottom: 0;
  width: 20px;
  height: 20px;
  background: transparent;
  border-bottom-right-radius: 20px;
  box-shadow: 5px 5px 0 5px var(--clr);
}
header nav a.active::after{
  content:'';
  position: absolute;
  right: -20px;
  bottom: 0;
  width: 20px;
  height: 20px;
  background: transparent;
  border-bottom-left-radius: 20px;
  box-shadow: -5px 5px 0 5px var(--clr);
}